The definition of 2. 0 in technology is the second major release of a software, website, or application. When developers release a new version of the product, they will give it a version number like 2. 0 to indicate that the product has had a major upgrade or a major change. The meaning of 2. 0 became mainstream during the “Web 2. 0” time when websites became more interactive and social. Today, technology companies will name upgraded versions of existing products 2. 0 even if the meaning of 2. 0 is not relevant. In fact, 2. 0 has come to often mean modern or inventive.